Songkran

The Thai New Year (Thai: Songkran) is celebrated every year on 13 April to 15 April. It is also celebrated in Laos (called pi mai lao or ‘Lao New Year’ in Lao), Cambodia, Myanmar (where it is called Thingyan), and by the Dai people in Yunnan, China. Sri Lanka also celebrates a similar festival called Sinhalese and Tamil New Year on the same dates. The same date is celebrated widely throughout the Indian subcontinent, albeit based on the astrological event of the sun beginning its northward journey.@wikipedia